Wireless-Charging Chip Puts Smartphones In Your Face Faster

STMicroelectronics launches what it’s calling one of the world’s first chips to support Qi Extended Power, the latest industry standard for faster charging. The Wireless Power Consortium (WPC) that manages the Qi specification has introduced the Extended Power profile for faster charging. By raising the maximum charging power from 5W to 15W, this new profile enables devices to be charged up to three times more quickly.


One of the market’s first wireless-charging controllers to support Qi Extended Power, the STWBC-EP consumes 16 mW in standby and is able to wirelessly transfer more than 80% of its total input power. Features include a patented solution enhancing active presence detection to wake the system quickly when a compatible object is presented for charging. The patented technology also enhances the performance of Foreign Object Detection (FOD), to cut power and prevent overheating if objects containing metals are brought too close to the charger. Other unique innovations enhance power control and energy transfer to maximize efficiency and ease of use.

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The STWBC-EP provides the level of integration allowing to simplify charger design while providing the flexibility to work with supply voltages ranging from 5V USB power up to 12V.


To help accelerate time to market for product developers, an associated reference design is available with a Qi 15W ready-built transmitter board and documentation to get started. ST also has a 15W receiver chip (STWLC33) for use in high-speed chargeable devices, which developers can use to complete their applications.


The STWBC-EP is available now, in a 32-lead, 5 mm x 5 mm QFN package, priced from $3.175 each/1,000. An STWBC-EP datasheet is also available for your viewing pleasure and more information is available from STMicroelectronics.

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